Question

The concentration of a solution in terms of mass by mass is 10.71% (W/W). Calculate the mass of solute present in 250g of the solvent (water).​

Answer 1

Dear Student,
Concentration = 10.71% (w/w)
Let the mass of solute = x
$Mass\%ofsolute=\frac{massofsolute}{massofsolute+massofsolvent}\times 100$
$10.71=\left(\frac{x}{x+250}\right)\times 100$
$\frac{10.71}{100}=\frac{x}{x+250}$
$$\begin{gathered} 0.1071x-x=-26.775 \\ x=30gm \end{gathered}$$
Mass of solute = 30 gm
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